hosts/library: extract jellyfin config

hosts/library/jellyfin.nix

@@ -0,0 +1,30 @@
+{
+  config,
+  pkgs,
+  ...
+}:
+
+{
+  hardware.graphics = {
+    enable = true;
+    extraPackages = with pkgs; [
+      vaapiVdpau
+    ];
+  };
+
+  users.users.jellyfin.extraGroups = [
+    "video"
+    "render"
+  ];
+
+  services.jellyfin = {
+    enable = true;
+    package = pkgs.unstable.jellyfin;
+    cacheDir = "/var/cache/jellyfin";
+    dataDir = "/var/lib/jellyfin";
+  };
+
+  modules.services.borgmatic.directories = [
+    config.services.jellyfin.dataDir
+  ];
+}